电压型联络开关非正常自动合闸对配网的影响分析

The Impact of Abnormal Automatic Closing of Voltage Type Loop Switches on Distribution Network

由于电压型馈线自动化联络开关动作过程受到自身"电压—时序"逻辑控制,在非故障情况下可能会错误触发自动转供程序而合闸,造成环网线路长期合环运行、故障范围扩大等问题。在介绍电压型馈线自动化系统动作原理的基础上,分析电压型联络开关非正常自动合闸的原理及过程,以实际案例分析其导致接地故障影响范围扩大的过程及原因,并提出了相应的防范措施。

As the operation of voltage type loop switches is controlled by the ＂ voltage-time＂ logic, loop switches may be closed as a result of the automatic transfer program trigged by a mistake, which can cause problems like the overtime loop-closing operation for feeders and the fault impact scope expansion.The forming reason and process of the abnormal automatic closing of voltage type loop switches is analyzed based on the principle of voltage-time type feeder automation.Through the analysis of the treatment process of a grounding fault, it is proved that the abnormal automatic closing of voltage type loop switches can cause the expansion of the impact scope of grounding faults.Precautionary measures are proposed at last to avoid these problems.